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GPU Comparison
AMD Radeon HD 6870 vs AMD Radeon RX 580
AMD Radeon HD 6870 vs AMD Radeon RX 580
VS
AMD Radeon HD 6870
AMD Radeon RX 580
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 8GB VRAM Radeon RX 580 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6870 's Advantages
Lower TDP (151W vs 185W)
AMD Radeon RX 580 's Advantages
Released 6 years and 6 months late
Boost Clock1340MHz
More VRAM (8GB vs 1GB)
Larger VRAM bandwidth (256.0GB/s vs 134.4GB/s)
1184 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 6870
2.016 TFLOPS
Radeon RX 580
+206%
6.175 TFLOPS
Radeon HD 6870
VS
Radeon RX 580
Graphics Card
Oct 2010
Release Date
Apr 2017
Northern Islands
Generation
Polaris
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
1257 MHz
-
Boost Clock
1340 MHz
1050 MHz
Memory Clock
2000 MHz
Memory
1024MB
Memory Size
8GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
134.4GB/s
Bandwidth
256.0GB/s
Render Config
-
SM Count
-
14
Compute Units
36
1120
Shading Units
2304
56
TMUs
144
32
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
2 MB
Theoretical Performance
28.80 GPixel/s
Pixel Rate
42.88 GPixel/s
50.40 GTexel/s
Texture Rate
193.0 GTexel/s
-
FP16 (half)
6.175 TFLOPS
2.016 TFLOPS
FP32 (float)
6.175 TFLOPS
-
FP64 (double)
385.9 GFLOPS
Graphics Processor
Barts
GPU Name
Polaris 20
Barts XT (215-0798000)
GPU Variant
Polaris 20 XTX (215-0910038)
TeraScale 2
Architecture
GCN 4.0
TSMC
Foundry
GlobalFoundries
40 nm
Process Size
14 nm
1.7 billion
Transistors
5.7 billion
255 mm²
Die Size
232 mm²
Board Design
151W
TDP
185W
450 W
Suggested PSU
450 W
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
Outputs
1x HDMI 2.0b 3x DisplayPort 1.4a
2x 6-pin
Power Connectors
1x 8-pin
Graphics Features
11.2 (11_0)
DirectX
12 (12_0)
4.4
OpenGL
4.6
1.2
OpenCL
2.1
N/A
Vulkan
1.2
-
CUDA
-
5.0
Shader Model
6.4
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